CN104280810B - A kind of polarizer and display device - Google Patents
A kind of polarizer and display device Download PDFInfo
- Publication number
- CN104280810B CN104280810B CN201410522293.XA CN201410522293A CN104280810B CN 104280810 B CN104280810 B CN 104280810B CN 201410522293 A CN201410522293 A CN 201410522293A CN 104280810 B CN104280810 B CN 104280810B
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- Prior art keywords
- light
- linearly polarized
- polarizer
- polarized light
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- 230000010287 polarization Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims description 35
- 239000011521 glass Substances 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
It is an object of the invention to provide a kind of polarizer and display device, wherein, the polarizer is made up of multiple connected polarization structures；Polarization structure is specifically included：Enter light unit；Spectrophotometric unit, for the light that is produced in backlight module after entering light unit incidence, light is decomposed into the first linearly polarized light of the first polarization direction and the second linearly polarized light of the second polarization direction；Light-emitting units, for the first linearly polarized light to be projected；Become light unit, the 3rd linearly polarized light for the second linearly polarized light to be converted to the first polarization direction；Wherein the 3rd linearly polarized light after the light-emitting units and spectrophotometric unit in adjacent deflection structure by projecting.Polarizer in the present invention, incident ray can be all converted to direction of vibration identical linearly polarized light so that the theoretical transmission of polarizer reaches 100%, improves the transmitance of polarizer.
Description
Technical field
The present invention relates to polarizer field, more particularly to a kind of polarizer and display device.
Background technology
Either traditional liquid crystal display LCD, or emerging Organic Light Emitting Diode OLED display, be unable to do without
Polarizer.
When making, a unit selects to inhale conventional polarizers using aeolotropic crystal to the polarised light of different direction of vibration
The characteristic of receipts, such as H polarizers or K polarizers, outgoing polarization light is realized by stretching the iodine chain of iodo- polyvinyl alcohol molecule formation
Purpose；Refracted light is divided into o light and e light, because o light is observed by Unit one using the selective refraction principle of birefringece crystal
The law of refraction, and e light does not observe the law of refraction, there is a walk-off angle in its radiation direction and wave normal direction, cause birefringence brilliant
Body polarizer can only also utilize a linearly polarized light for polarization direction.
As can be seen that transmitance always is the bottleneck of conventional polarizers, polarizer transmitance best at present can not
More than 50%, the luminous energy of big unit is wasted.Therefore, the transmitance of raising polarizer is undoubtedly various displays and has to challenge
Direction.
The content of the invention
It is an object of the invention to provide a kind of polarizer and display device, the transmitance of polarizer is improved.
To achieve these goals, a kind of polarizer is the embodiment of the invention provides, the polarizer is connected by multiple
Polarization structure is constituted；
The polarization structure is specifically included：
Enter light unit；
Spectrophotometric unit, after the light for being produced in backlight module enters light unit incidence described in, by the light point
Solve the second linearly polarized light of the first linearly polarized light and the second polarization direction for the first polarization direction；
Light-emitting units, for first linearly polarized light to be projected；
Become light unit, the 3rd linearly polarized light for second linearly polarized light to be converted to the first polarization direction；
Wherein described 3rd linearly polarized light is by the light-emitting units in the adjacent deflection structure and the light splitting
Projected after unit.
Above-mentioned polarizer, wherein, first linearly polarized light is that the spectrophotometric unit reflects the backlight module generation
Light obtain, second linearly polarized light is that the spectrophotometric unit reflects the light that the backlight module produces and obtains.
Above-mentioned polarizer, wherein, first polarization direction is P component directions, and second polarization direction is S components
Direction.
Above-mentioned polarizer, wherein, the light by it is described enter light unit be refracted to the spectrophotometric unit when, incidence angle
It it is 90 degree with refraction angle sum.
Above-mentioned polarizer, wherein, for formed it is described enter light unit the refractive index of the first material be first refractive index；
The spectrophotometric unit is specifically included：
With the equal plane of the multiple parallel and spacing of the second material, wherein being set between the adjacent plane
The material of the first material is stated, the second refractive index of second material is more than the first refractive index.
Above-mentioned polarizer, wherein, the light-emitting units are formed by first material.
Above-mentioned polarizer, wherein, first material is specially soft glass or polymer.
Above-mentioned polarizer, wherein, second material is specially soft glass or polymer.
Above-mentioned polarizer, wherein, the change light unit is specially 1/2nd slides, and the slide optical axis and institute
It is 45 degree to state the angle between the second linearly polarized light.
To achieve these goals, the embodiment of the present invention additionally provides a kind of display device, and the display device is used
Polarizer described in any of the above-described.
Polarizer described in the embodiment of the present invention, incident ray can be all converted to direction of vibration identical line inclined
Shake light so that the theoretical transmission of polarizer reaches 100%, improves the transmitance of polarizer.
Brief description of the drawings
Fig. 1 is schematic diagram when light is reflected and reflected by different medium in the prior art；
Fig. 2 be light provided in an embodiment of the present invention pass through polarization structure when schematic diagram；
Fig. 3 is the schematic diagram of polarizer provided in an embodiment of the present invention.
Specific embodiment
Before the embodiment of the present invention is introduced, first to the present invention relates to principle be introduced.
As shown in figure 1, when light from refractive index be n1First medium be slanted through refractive index for n2Second medium when, two
There is reflection and reflect in the intersection for planting medium.According to Fresnel Fresnel formula, incident light can be divided into direction of vibration mutual
Vertical S components linearly polarized light and P component linearly polarized lights, the direction of vibration of S component linearly polarized lights is perpendicular to the plane of incidence, P components
Linearly polarized light is oriented parallel to the plane of incidence.S components linearly polarized light and P components linearly polarized light are in the corresponding reflectivity in interface and thoroughly
Penetrate as follows than formula.
The reflectivity of S component linearly polarized lights is：
(formula 1)
The transmittance of S component linearly polarized lights is：
(formula 2)
The reflectivity of P component linearly polarized lights is：
(formula 3)
The transmittance of P component linearly polarized lights is：
(formula 4)
From above formula, we can derive following two conclusions：
<Conclusion one>
Work as θ1+θ2During=pi/2, ρPDo not exist P component linearly polarized lights, entirely S components linear polarization in=0, i.e. reflected light
Light.
<Conclusion two>
When the refringence △ n of two media are larger, τP>>τs, i.e., P components linearly polarized light accounts for definitely many in transmitted light
Number.
Based on conclusions, the present invention will be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
A kind of polarizer is the embodiment of the invention provides, the polarizer is made up of multiple connected polarization structures；
The polarization structure is as shown in Fig. 2 specifically include：
Enter light unit 21；
Spectrophotometric unit 22, after the light 25 for being produced in backlight module enters the incidence of light unit 21 described in, will be described
Light 25 is decomposed into the first linearly polarized light 26 of the first polarization direction and the second linearly polarized light 27 of the second polarization direction；
Light-emitting units 23, for first linearly polarized light 26 to be projected；
Become light unit 24, the 3rd linearly polarized light for second linearly polarized light 27 to be converted to the first polarization direction
28；
Wherein described 3rd linearly polarized light 28 is by light-emitting units 23 in the adjacent deflection structure and described
Projected after spectrophotometric unit 22.
In embodiments of the present invention, the light 25 that can be produced backlight module after spectrophotometric unit 22 by being decomposed into two
The linearly polarized light of individual direction of vibration, wherein, the first linearly polarized light 26 is projected by light-emitting units 23, and the second linearly polarized light 27 is in warp
Cross after change light unit 24 be converted to the linearly polarized light 28 of 26 direction of vibration identical of the first linearly polarized light the 3rd, and by adjacent
Projected after the light-emitting units 23 and the spectrophotometric unit 22 in the deflection structure.When deflection film is by multiple deflection structure groups
Cheng Shi, as shown in figure 3, the theoretical transmission of polarizer provided in an embodiment of the present invention can reach 100%, with existing polarization
Piece is greatly improved compared to its transmitance.
Wherein be used to being formed it is described enter light unit 21 the refractive index of the first material be first refractive index, it is preferable that enter light
Unit 21 can be with the relatively low transparent material of selective refraction rate, such as soft glass or polymer etc..In the light that backlight module is produced
After 25 enter the incidence of light unit 21 described in, two different linearly polarized lights of direction of vibration are decomposed into by spectrophotometric unit.This
In first with above-mentioned conclusion one, the light 25 by it is described enter light unit 21 be refracted to the spectrophotometric unit 22 when,
Incidence angle θ1With firing angle θ2Sum should be 90 degree, can so ensure that light 25 is being irradiated into light unit 21 and spectrophotometric unit 22
Between interface when, do not exist P component linearly polarized lights, entirely S components linearly polarized light 27 in reflected light；And then using above-mentioned
Conclusion two, it is ensured that the second refractive index for constituting the second material of spectrophotometric unit 22 is more than the first refractive index, the second refractive index
Bigger with first refractive index difference, the ratio in transmitted light shared by P components linearly polarized light is bigger.Here the second material is preferably
Can be soft glass or polymer etc.
That is, in actual applications, first refractive index and the second refractive index can be determined according to formula 5 and 6：
Sinθ1/Sinθ2=n2/n1(formula 5)
θ1+θ2=pi/2 (formula 6)
Wherein, n1And n2On the basis of above-mentioned two formula is met, n2-n1Value it is bigger, effect is better.
Further, in order to improve the ratio in transmitted light shared by P component linearly polarized lights as much as possible, implement in the present invention
In example, it is preferable that light 25 repeatedly can be reflected.I.e. spectrophotometric unit 22 is made up of two parts, with the second material
The equal plane 221 of multiple parallel and spacing, spacing with very little, but be able to can not be sticked, wherein between the adjacent plane 221
The material 222 of first material is provided with, the second refractive index of second material is more than the first refractive index.
Because spectrophotometric unit 22 is arranged in parallel construction, the original of the direction of propagation is not changed by parallel plane according to light
Reason, it can be deduced that, when refraction light 26 enters second light splitting interface, also meet θ1+θ2=pi/2 and n2-n1>0 relation,
Two light splitting interface birefringence light 26 carry out further light splitting, make all S components linearly polarized lights of reflected light, and in reflecting light
P component linearly polarized light ratios further lifted, the parallel construction quantity with spectrophotometric unit 23 increases, into light-emitting units
23 refraction light be degree of polarization close to 100% P component linearly polarized lights.
Further, in order to ensure the refraction light direction of light 26 and enter that light direction is consistent, the material of light-emitting units 23 with enter
The material of light unit 21 is identical.I.e. described light-emitting units 23 are formed by first material.
In embodiments of the present invention, first material is specially soft glass or polymer, similarly, second material
Soft glass or polymer etc. can also be specially.Certainly, above-described material is only preferred side provided in an embodiment of the present invention
Formula, when the first material and the second material is selected, it is only necessary to ensure that incidence angle and refraction angle sum are 90 degree and n2-n1>0
, the material of polarizer is no longer defined to crystal, therefore can largely reduce cost.
In addition, enter becoming light unit 24, change light unit 24 here in the S components linear polarization 27 that spectrophotometric unit 22 is reflected
It is 1/2nd slides, and makes the optical axis (fast axle or slow axis) of slide and the angle of S component lines polarized reflection light 27 be 45
Degree, so according to linearly polarized light by 1/2nd slides still be linearly polarized light and direction of vibration and principle vertical before, S divide
Amount linearly polarized light 27 is converted to P components linearly polarized light 27 ' by becoming light unit 24.Meanwhile, because into the reflection before slide
Light inherently linearly polarized light, therefore slide, to its transmitance close to 100%, the side hence into adjacent polarization structure is incident
Light has been entirely the linearly polarized light 27 ' of P components.
P components linearly polarized light 27 ' is by the light-emitting units 23 and the spectrophotometric unit 22 in adjacent deflection structure
After be emitted as P components linearly polarized light 28.
So by said process, the light 25 that polarizer provided in an embodiment of the present invention produces backlight module is by two
Individual structure of polarized light, is respectively converted into the P components linearly polarized light 26 that is projected from first structure of polarized light and from second structure of polarized light
The P components linearly polarized light 28 of injection, makes the luminous energy of incident ray be fully utilized, and has reached and convert incident light into
The purpose of linearly polarized light.When deflection film is made up of multiple deflection structures, as shown in figure 3, polarizer in theory can be by incidence
Light 100% is converted into linearly polarized light (in the case of not considering that material absorbs), is 2 times of traditional polarizer transmitance, therefore
The significant increase energy-conserving and environment-protective ability of product.
In addition, the range of choice of the material to constituting polarizer is very wide, it is only necessary to meet incidence angle and refraction angle sum is
90 degree and n2-n1>0, material is no longer defined to crystal, therefore can largely reduces cost.
The embodiment of the present invention additionally provides a kind of display device, and the display device has used inclined described in any of the above-described
Shake piece.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of polarizer, it is characterised in that the polarizer is made up of multiple connected polarization structures；
The polarization structure is specifically included：
Enter light unit, for formed it is described enter light unit the refractive index of the first material be first refractive index；
Spectrophotometric unit, after the light for being produced in backlight module enters light unit incidence described in, the light is decomposed into
First linearly polarized light of the first polarization direction and the second linearly polarized light of the second polarization direction；
Light-emitting units, for first linearly polarized light to be projected；
Become light unit, the 3rd linearly polarized light for second linearly polarized light to be converted to the first polarization direction；
Wherein described 3rd linearly polarized light is by the light-emitting units and the spectrophotometric unit in the adjacent polarization structure
After project；
The spectrophotometric unit is specifically included：
With the equal plane of the multiple parallel and spacing of the second material, wherein being provided with described between the adjacent plane
The material of one material, the second refractive index of second material is more than the first refractive index.
2. polarizer as claimed in claim 1, it is characterised in that first linearly polarized light is spectrophotometric unit refraction institute
The light for stating backlight module generation is obtained, and second linearly polarized light is that the spectrophotometric unit reflects what the backlight module was produced
Light is obtained.
3. polarizer as claimed in claim 2, it is characterised in that first polarization direction is P component directions, described second
Polarization direction is S component directions.
4. polarizer as claimed in claim 2 or claim 3, it is characterised in that the light by it is described enter light unit be refracted to institute
When stating spectrophotometric unit, incidence angle is 90 degree with refraction angle sum.
5. polarizer as claimed in claim 1, it is characterised in that the light-emitting units are formed by first material.
6. polarizer as claimed in claim 1, it is characterised in that first material is specially soft glass or polymer.
7. polarizer as claimed in claim 1, it is characterised in that second material is specially soft glass or polymer.
8. polarizer as claimed in claim 1, it is characterised in that the change light unit is specially 1/2nd slides, and institute
It is 45 degree to state the angle between the optical axis of slide and second linearly polarized light.
9. a kind of display device, it is characterised in that the display device has used the polarization as described in claim any one of 1-8
Piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522293.XA CN104280810B (en) | 2014-09-30 | 2014-09-30 | A kind of polarizer and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522293.XA CN104280810B (en) | 2014-09-30 | 2014-09-30 | A kind of polarizer and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104280810A CN104280810A (en) | 2015-01-14 |
| CN104280810B true CN104280810B (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410522293.XA Expired - Fee Related CN104280810B (en) | 2014-09-30 | 2014-09-30 | A kind of polarizer and display device |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2518137Y2 (en) * | 1989-10-24 | 1996-11-20 | 京セラ株式会社 | Polarizing beam splitter |
| GB2256725B (en) * | 1991-06-10 | 1995-01-18 | Alps Electric Co Ltd | Polarising light separation element and light receiving optical device using same |
| JP2001100030A (en) * | 1999-09-29 | 2001-04-13 | Fujitsu General Ltd | Polarized light spectral element and video projection device using same polarization spectral element |
| GB2408588A (en) * | 2003-11-27 | 2005-06-01 | Sharp Kk | Polarisation conversion optical system eg with dispersion compensation for liquid crystal projection |
| TWI372304B (en) * | 2008-02-12 | 2012-09-11 | Young Optics Inc | Polarization conversion system and illumination module |
| CN102331628A (en) * | 2010-07-13 | 2012-01-25 | 任贻均 | Optical system capable of enhancing polarization in light ray and light source system with same |
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2014
- 2014-09-30 CN CN201410522293.XA patent/CN104280810B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN104280810A (en) | 2015-01-14 |
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